In 2012, Anne-Marie Slaughter published an essay in The Atlantic  titled, “Why Women Still Can’t Have It All,” which became one of the most-read pieces in the magazine’s history and reignited the debate about work-life balance in the United States. In the piece, she explained why she left her position as the first female director of policy planning at the U.S. State Department to return to a career that would enable her to spend more time with her family, a choice she never expected to make. As she wrote then, “[T]he decision to step down from a position of power — to value family over professional advancement, even for a time — is directly at odds with the prevailing social pressures on career professionals in the United States.” Now, in a new book, Unfinished Business: Women Men Work Family , Slaughter expands on what individuals, organizations and companies, and the government can do to support greater equality for women and men with regard to work and family.…